Fix shared library versions.

Index: libfdt/Makefile.libfdt
--- libfdt/Makefile.libfdt.orig
+++ libfdt/Makefile.libfdt
@@ -10,7 +10,7 @@ LIBFDT_VERSION = version.lds
 LIBFDT_SRCS = fdt.c fdt_ro.c fdt_wip.c fdt_sw.c fdt_rw.c fdt_strerror.c fdt_empty_tree.c \
 	fdt_addresses.c fdt_overlay.c fdt_check.c
 LIBFDT_OBJS = $(LIBFDT_SRCS:%.c=%.o)
-LIBFDT_LIB = libfdt-$(DTC_VERSION).$(SHAREDLIB_EXT)
+LIBFDT_LIB = libfdt.$(SHAREDLIB_EXT).${libfdt_ltversion}
 
 libfdt_clean:
 	@$(VECHO) CLEAN "(libfdt)"